Bobber won't despawn when un-holding fishing rod when aimed straight down

As in the title, when I look straight down and use the fishing rod, the bobber won't despawn, even after I use it again, or switch my item from it, or remove the fishing rod COMPLETELY. it just stays there, connected to me.

Now for the strange thing:
When I try to relog, it stops responding and crashes.
I can't provide a crash report because the new launcher doesn't provide it.

A picture that demonstrates the bug, where I hold nothing but the bobber is still there, attached to me, is attached.

I hope this will be fix ASAP!
Thanks.